Riveting-machine



s Sheets-Sheet 2. 0. PLHIGGINS. RIVBTINGMAGHINB.

Patented Au-g; 14, 1894.

. (N0 Moslel.) -3 Sheets-Sheet 3.

- C. P. HIGGINS.

RIVETING MACHINE.

' No 524,325. Patented Aug. 14 1894.

mmbo'c L JQE UNITED- STATES PATENT Orrrcnif CAMPBELL P. HIGGINS, OFROSELLE, NEW. JERSEY.

RlVET-ING-"MACHINE.

SPECIFICATION forming part of Letters Patent No. 524,325, dated August14, 1894. 7 Application filed May 27, 1893. Serial No- 475.7s7. (Nomodel.)

pression efiected without strain on the interior support.

- The invention consists in an apparatus having a series of hydraulicplungers aligned so as to form when extended, a continuous abuttingconnection from one exterior support to and through the work to anotherexterior support; the interior support is thereby relieved of thefunction of resisting the working strains, and may therefore beprojected from its fastening point to any desired distance to 'suit, thelongest drum.

The invention also embodies certain various novel details ofconstruction; and in or der to enable others skilled in the art to whichsaid invention appertains to understand and use the same, I will proceedto describe its construction, explain its operation, and point out inthe appended claims its novel characteristics.

' Referring to the accompanying drawings: Figure 1, is a sectionalelevation of an apparatus embodying my invention; Fig. 2, a plan view ofFig. 1, partly taken in section on the line y y; Fig. 3, a horizontalsection showing the construction of each of the exterior rams on anenlarged scale; Fig. 4, an end view of Fig. 3; Fig. 5, a detailsectional view pertainingto Fig. 3; Fig. 6, a horizontal sectional viewshowing the hydraulic ram interior to the work in detail; and Fig. 7, anend View of. Fig. 6.

A, Fig. 1, represents the external structure or framework of theapparatus, comprising a shell which is placed within a foundation ofmasonry B, extending for convenience below the level of the floor O.

Upon the shell or main frame A, are mounted the standards D, E, carryingthe exhydraulic cylinder J. The standard I, may

be of any suitable length, and the shell A, of

any suitable depth and diameter such as necessary or convenient forthereception of the work K, having the intended dimensions.

Pipes 20, 23, for operating the plunger of the internal hydrauliccylinder J, are arranged to pass down into the shell A, and upward alongthe sides of the column I, giving clearance to the work as seen in Fig.1.

Referring to Figs. 1,and 2, and'also to Figs.

3 and 6, the pipes indicated by 20, supplied with a constant minimumpressure, extend to the various parts of the apparatus to operate theretracting plungers 2, 2, and 3, 3, which counteract the workingplungers 4:, 5, to release them from the work after each operation.

The pipes 23, extend from asource of variable maximum pressure to theseveral working plungers 4,

The pipes 20, may be connected tothe con stant pressure pipes of anapparatusfor automatically intensifying and equalizingpressure such asdescribed in my separate patent application filed simultaneouslyherewith, Serial No. 475,788, and the pressure pipes 23, may beconnected to the delivery pipe of the compressor described'therein andcontrolled by'means of a suitable distributing valve adapted toalternately chargeand exhaust such pipes 23, at each operation.

Referring to the detail views, Figs. 3, to 7, inclusive, the severalplungers 2, 3, 4t, 5, are

provided with suitable hydraulic packings.

The working plungers 4, and 5, are each provided with cross-heads 6, towhich the retracting plungers2, 2, 3, 3, are connected.

The riveting rams, 7, 8, and 9, 10, are removable and interchangeablefor others of difierent lengths; such being selected as will completewhen in working position a continuous abutting connection from the oneexterior support D, to and through the work K, to the other exteriorsupport E the diameter of the drum K, or dimension of other workdetermining the selection.

In event of error in the selection of any of the plungers 7, 8, 9, 10,means are provided for permitting the escape of the working pressnrefrom cylinders F, G, or J. This consists in packed lugs 11, provided toeach ram, whch project through each cylinder or its working plunger, andare exposed to the pressure within. In event of any of the rams beingtoo short and failing to make abutting connection preparatory to theoperation of the machine, such ram is forced out until its plug 11,allows an escape opening for the working pressure to find its exit, thusavoiding lateral strain upon the column I, or other cause of injury tothe apparatus.

As seen in Fig. 7, the cylinder J, is secured in a hollow block 30, bymeans of bolts 31.

The cylinders F, G, are made integral'with or supported in yokes M, N,connected together by tie rods 32, at a suficient distanceapart to clearthe work. Thus, the standards D, E, are free from strain, and as is thecase with the column Lserve solely to support the hydraulic cylinders atcoincident level.

In operation, all the rams 7, 8, and 9, 10, may be used for rivetingsimultaneously; the rivets 70, on bothsides of the drum being upset ateach compression,as seen in Fig. 6, and the drum rotated at eachretractive movement of the plungers 4, 5, doubling the capacity of theapparatus as compared with machines heretofore used.

This invention may also be applied for the purpose of punching plates,orpunching the rivet holes after the drums have been formed.

Having thus fully described my invention, what I claim, and desire tosecure by Letters Patent, is

1. In a hydraulic riveting machine, the combination of a series ofexternal and internal hydraulic cylinders and rams connected therewithin axial line when in working position, to operate simultaneously onboth sides of the work and form a continuous abutting connection fromone fixed support to and through the work to another fixed support.

2. The combination, in a hydraulic riveting machine, of two externalfixed supports, an internal support, a terminal hydraulic'cylinder andram on each external support, also an intermediate hydraulic cylinderand rain on the internal support, said rivetingrams operating andabutting in continuous series from one said support to the other.

3. A riveting machine composed of external supports and an internalsupport, with hydraulic cylinders and riveting rams arranged in axialline on the respective supports, the internal support being projected toany desired distance within the work.

CAMPBELL P. HIGGINS.

WVitnesses:

L. D. BURNHAM, W. A. PEARSALL.

